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E. G. ANDERSON AND A. H. GRAHAM.

CANvAs SECURING FASTENING CLAMP ron HATCHES 0F VESSELS.

APPLICATION FILED MAR. I4. 1918.

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EDWARD G. AnDEnsoN AND H. GRAHAM, or'ron'rmnn, OREGON.

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Specification of Pctters Patent. Aug, 5 1919,

Application filed March 14, 1918. Serial No. 222,487.

To all whom it may concern: r r

Be it known that we, EDWARD G. ANDER- SON and ARCHIE H. GRAHAM, citizens of the United States, and residents, respectively, of the city of Portland, county of Multnomah, State of Oregon, have invented a certain new and useful Improvement in Canvas-Securin Fastening-Clamps for Hatches of Vesse s, of which the following is a specification.

The object of our invention is to provide simple, durable and efficient means for fastening a bar against the overlapping ends of the canvas covering the hatch of a vessel. Furthermore, our invention has for its object the providing of fastenin means which, when arranged in their ho ding position, have no parts which project in the way or on which ropes or cables may catch. This we consider an essential feature of a practical device for the purpose stated. In other words, all surfaces of fastening devices should be substantially smooth throughout the structure.

We attain our object in the cam-like clamping device comprising a bracket having a resilient hinge arm, to the free extremity of which is hinged a clamping or cam lever, the cam of the latter being adapted to restrain the same in its clamping position; and means being provided for completely housing the ti of the cam lever when arranged in its 0 amping position so as to prevent its inadvertent displacement.

The details of construction and operation of our device are illustrated in the accompanying drawings, in which:

Figure 1 shows a portion of the deck of a vessel and the coaming of a hatchway, to which one of our clamps is applied, as in practice, for holdin the bar across the edge of the canvas; and

Fig. 2 is a side elevation.

Referring first to Fig. 1, 11 represents the deck of a vessel, b the coani'ing of the hatch, and c is the canvas, across the overlapping edge of which is a bar (Z, which is held in place by a series of our clamps. The latter comprise a bracket 6 made with an integral hinge arm f adapted to have some resiliency. The free extremity g of the hinge arm is made with a bifurcate hinge knuckle. In such knuckle is hinged a clamping or cam lever h by means of a. hinge pin 2', and is made with a cam lug 9'. Below the hinge arm f is provided a box 70, in which to receive the tip of the lever The lat ter has a convex face m and a fiat face a at the tip. The surfaces is of the sides of the box is are curved to conform with the convex surface are. at the tip of the cam lever h, as more clearly shown in Fig. 2, so that when the flat face n of the ti of the cam lever is seated in the box is t e tip of the cam lever will be completely housed in the box is. The cam lug j is adapted to have a tendency to hold the cam lever it down, i. e., in its active position, and the tip thereof in the box is, so that the cam lever must be forcibly moved out of its holding position. The bracket 6 supports the bar d in place when the cam lever k is in its inactive or non-clamping position.

The practical use of our device is evident from its description. When the bar 03 is to be placed over the edge of the canvas, or removed, the cam lever h is pulled forward, as shown in dotted outline in Fig. 2, thus placing the cam lever in its inactive position; while so positioned the canvas and the bar 03 ma be readily inserted under the cam head 7' o the cam lever; and when the bar d is to be clamped in place the cam lever is arranged as shown in full outlines in Fig. 2 and also as shown in Fig. 1.

We claim:

1. In a clamping device of the character described, the combination of a bracket having a resilient hinge arm, a cam lever hinged thereto and provided with a cam-lug about its hinge axis, a box located below the hingearm on the bracket and adapted for receiving the tip of the cam lever, and the camlug being adapted to tend to hold the tip of the cam-lever seated in said box when the former is arranged in its holding position.

2. In a clamping device of the character described, the combination of a bracket having a resilient hinge arm, a cam-lever hinged in the extremity of the latter and provided with a cam-lug about its hinge axis, a box located below the hinge-arm on the bracket and adapted for receiving the tip of the cam lever, the cam-lug being adapted to tend to hold the tip of the cam-lever seated in said box when the former is arranged in its holding position, and the tip of the cam lever and the sides being made with conforming surfaces adapted to completely house said tip in said box.

3. In a clamping device of the character described, the combination of a cam lever V r R 1,312,496

-lentl hinged at one end, and means r 101 gheji-p of $181283; lever when in its 1161' lhg'jbhslt'ifih, ffhei'eby 'plev iiting the inadvertentdisplacement of the cam 1e- 5 ver.

4;. A c lam nping device of the charecter de- -srilfieii camprism a bracket, a cam lever inadvertent displacement of the cam lever.

EDWARD G. ANDERSON. ARCHIE H. GRAfiirM.

copies of thin patent may be obtained for live cents each, by addressing the "Commissioner of Patents,

'Walhington, D. 0. 

